How do their growth rates compare?

OpenLIT has a month-over-month growth rate of -18.3%; Respan has -14.5%.

How does pricing compare?

OpenLIT: Free. The open-source edition is the free tier and is licensed under Apache 2.0, covering agent observability, evaluations, guardrails, Prompt Hub, Vault, OpenGround, coding-agent monitoring, and GPU metrics. There is no charge to self-host and no license key required. OpenLIT Cloud is not generally available yet. A separate Enterprise Edition adds capabilities such as the zero-code eBPF controller; check the official pricing page for current enterprise terms. Respan: Freemium. Freemium. There is a free tier plus volume-based and enterprise options that require contacting sales; token pricing varies by model, and Respan advertises bulk rates with a 0% routing fee. Verify current figures on the official pricing page.

What are alternatives to OpenLIT and Respan?

Other tools in related categories include OpenRouter, Ollama, OrcaRouter, LiteLLM, Arize AI.

OpenLIT vs Respan — Traffic (6.03K vs 91.5K), Pricing & Verdict

Open AI Tools

OpenLIT vs Respan — Traffic (6.03K vs 91.5K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	OpenLIT	Respan
Official Domain	openlit.io	respan.ai
Pricing Model	Free	Freemium
Monthly Visits	6.03K (6,028)	91.5K (91,503)
MoM Traffic Delta	-1.35K (-18.3%)	-15.53K (-14.5%)
Primary Market & Share	🇺🇸 United States (53.6%)	🇺🇸 United States (28.8%)
Direct Visits / mo	2.38K	23.12K
User Rating	4.7	4.5
Supported Platforms	Website	Website

OpenLIT

Open-source, OpenTelemetry-native observability and harness engineering for AI agents

LLM and agent tracing

Capture OpenTelemetry traces and metrics for every LLM call, tool invocation, retrieval, and agent step, and filter them by user, session, cost, latency, or custom metadata.

Evaluations on real traffic

Score production traffic or experiments with LLM-as-a-judge, heuristic checks, or human review so you can measure accuracy, relevance, and safety over time.

Prompt Hub and versioning

Manage and version prompts in Prompt Hub, then deploy, roll back, and update prompts without shipping new application code.

Vault for API keys

Store and rotate OpenAI, Anthropic, and other LLM API keys outside your codebase with an encrypted, rotating secrets vault.

Strengths & Pros

+OpenTelemetry-native design keeps traces and metrics portable and avoids vendor lock-in
+Broad free open-source edition under Apache 2.0 with unlimited self-hosted use
+Covers tracing, evals, guardrails, prompts, secrets, cost, and GPU monitoring in one platform
+56+ integrations across LLMs, agent frameworks, and vector databases, plus OTLP ingest from other tools